"populations"的搜索结果

找到 3 张相关图片

plague is characterized by periodic disease outbreaks in rodent populations

plague is characterized by periodic disease outbreaks in rodent populations

标签: plague,is,characterized,by,per 浏览: 14
aircraft as it was spraying insecticide in order to help eliminate populations of possible disease causing mosquitoes

aircraft as it was spraying insecticide in order to help eliminate populations of possible disease causing mosquitoes

标签: aircraft,as,it,was,spraying,in 浏览: 19
these malaria control workers whod been spraying malathion to combat mosquito populations

these malaria control workers whod been spraying malathion to combat mosquito populations

标签: these,malaria,control,workers, 浏览: 12

相关搜索建议

populations 风景 populations 高清 populations 背景 populations 壁纸 自然 populations